Automotive Communication Network Trends

Size: px
Start display at page:

Download "Automotive Communication Network Trends"

Transcription

1 Automotive Communication Network Trends Renesas Electronics America Inc.

2 Renesas Technology & Solution Portfolio 2

3 Microcontroller and Microprocessor Line-up bit 1200 DMIPS, Superscalar Automotive & Industrial, 65nm 600µA/MHz, 1.5µA standby 500 DMIPS, Low Power Automotive & Industrial, 90nm 600µA/MHz, 1.5µA standby 1200 DMIPS, Performance Automotive, 40nm 500µA/MHz, 35µA deep standby 165 DMIPS, FPU, DSC Industrial, 90nm 500µA/MHz, 1.6µA deep standby 165 DMIPS, FPU, DSC Industrial, 40nm 200µA/MHz, 0.3µA deep standby 8/16-bit 25 DMIPS, Low Power Industrial & Automotive, 150nm 190µA/MHz, 0.3µA standby 10 DMIPS, Capacitive Touch Wide Industrial Format & LCDs Automotive, 130nm 350µA/MHz, 1µA standby 44 DMIPS, True Low Power Industrial & Automotive, 130nm 144µA/MHz, 0.2µA standby 3

4 Enabling The Smart Society Challenge: Automotive communication protocols are changing rapidly. The communication environment is growing quickly as users want access to more information available in-vehicle. Bandwidth requirements are dramatically increasing because of new functionality, more interaction between modules, and bandwidth-hungry signals such as video. Solution: This class will discuss the Automotive trends and how Renesas understands the requirements to meet future demands. 4

5 Agenda Terminology & Concepts Automotive Networks Today & Tomorrow Security in Automotive Energy Efficiency Trends Summary 5

6 Terminology & Concepts 6

7 Bus Access Single Master Multiple Slaves Configuration Master node controls bus access Establishes timing Initiates all communications Slave node(s) react to the master node Cannot initiate communications Peer-to-Peer / Multi-Master Any node can initiate communications Requires means to control access to the bus Token Passing Time Division Multiplexing (TDM) Agreed, assigned time to transmit Arbitrated Access CSMA variants 7

8 Arbitrated Access: CSMA CS = Carrier Sense Nodes wait for period without bus activity (IDLE time) before initiating communication MA = Multiple Access Every node has an opportunity to initiate communication CSMA-CD = CSMA with Collision Detection Stop communicating when collision is detected Try again from the start IEEE Ethernet (Half-Duplex Operation) CSMA-CA = CSMA with Collision Avoidance Divide channel somewhat equally among all nodes IEEE WiFi (not possible to listen while sending) Scope capture: Data spread out evenly time CSMA-CR = CSMA with Collision Resolution Resolve collision situations as they happen Highest priority message remains intact: sent without delay or retry All lower priority messages must retry in next IDLE time 8

9 CSMA-CR: Non-Destructive Bitwise Arbitration Dominant Bus State: Any node attempts to drive the bus to its dominant state bus = dominant Recessive Bus State: Bus assumes recessive state if no nodes are driving bus to dominant state Dominant wins over recessive Typical Implementation - CAN transceiver Active (transistor) drive to dominant state Passive (resistor) pull to recessive state Non-Destructive Bitwise Arbitration Node stops transmitting when it loses arbitration Loses arbitration: RX d bit NOT EQUAL TX d bit Field in the message header defines message priority 9

10 Event Driven vs. Time Driven Event Driven Medium used only when necessary Point when medium is accessible depends on current load Unknown delay between when medium access is requested and when it is actually accessed Time of message arrival is unknown Medium might be overloaded Time Driven Data potentially grouped Point in time when medium is accessible is defined / guaranteed Bandwidth utilization is known (duration of how long the medium is used) Time of arrival is defined / guaranteed Time Driven = Deterministic Mostly used for safety critical programs time Data spread out evenly 10

11 TDMA: Time Division Multiple Access Share the bus Dividing into different time slots Transmit in rapid succession each using its own time slot Wireless Slots assigned on demand in dynamic TDMA 2G cellular systems based on TDMA Wired consumer HSLAN over existing home wiring power lines, phone lines and coaxial cables Automotive FlexRay 11

12 Physical Media: Signal Formats Non Return to Zero (NRZ) Logical Bit value: bus state during the bit time 1 = a specific bus state (e.g. low voltage) 0 = a different specific bus state (e.g. high voltage) Cannot extract clock, not inherently self-synchronizing Manchester Logical Bit value: direction of transition in the middle of the bit time At least one transition during each data bit Self clocking clock can be recovered More bandwidth required, more EMI Bi-phase (Differential Manchester) Logical Bit value: presence / absence of transition in middle of bit time At least one transition every bit 12

13 Physical Media: Bit Stuffing NRZ Signaling Problem How to maintain synchronization when a long string of the same bit value is transmitted? Solution: Bit Stuffing 1 inverse polarity bit added ( stuffed ) after n identical bits Forces a transition edge: Synchronization Escape reserved code words such as frame sync sequence Drawbacks Results in variable data rate Reduces bus efficiency 13

14 Topology Ring Data travels around one direction Each device acts as a repeater Keeps the signal strong as it travels Star Each network host is connected to a central hub All traffic passes through the central hub Hub acts as a signal repeater Bus Each node is connected to a single cable Data travels in both directions to all nodes If node address does not match intended address for the data, node ignores data 14

15 Automotive Networks Today & Tomorrow 15

16 Automotive Networks Today Multiplexing Distributed Control Multi-Media 150M Data Rate (bps) 100M 25M 10M 1M 500K CAN Multi-Master/CSMA-CR Distributed Data FlexRay Multi-Master/Hybrid- TDMA Fault Tolerant MOST Timing Master/TDMA Designed for multimedia & infotainment 20K LIN Master-Slave Low cost I/O Interface 0.5 Source of cost for LIN, CAN, FlexRay, MOST: In-Vehicle Communication Networks: A Literature (Ugur Keskin). Ethernet cost: Engineering estimate Relative Communication Cost Per Node 16

17 LIN / CAN / FlexRay Comparison LIN CAN FlexRay Features Scalable, Deterministic, Slave Autobaud Detection (lower accuracy clock for slaves) Scalable, Event-Driven Time-Driven, Deterministic, Redundant, Fault-Tolerant, Global Time Base Medium Access Control Single Master Multi-Master CSMA-CR Multi-Master Hybrid TDMA Bit Coding NRZ NRZ w/ bit stuffing NRZ Nodes 1 master, up to 15 slaves 4 20, depending on distance / topology 4 22, depending on distance / topology Topology Bus Bus Star or Bus Typical Bus Speed Low: up to 20Kbps 33Kbps to 500Kbps typical 2.5Mbps to 10Mbps (bit/sec) 1Mbps capable Data & Frame Size 1-8 bytes payload 44 bits overhead 0 8 bytes payload 47 bits overhead (std ID) bytes payload 64 bits overhead 67 bits overhead (ext ID) Bus Utilization Efficiency 1 byte payload: 15% 8 byte payload: 52% 1 byte payload: 15% (std) 8 byte payload: 58% (std) 8 byte payload: 50% 254 byte payload: 97% (excluding idle time) 1 byte payload: 11% (ext) 8 byte payload: 49% (ext) Physical Media Single wire, 12V Single or dual wire, 5V Twisted pair, optical option Industry Acceptance (NA) Started: mid-1990 s, Wide acceptance: early 2000 s Started: early 1990 s Wide acceptance: late 1990 s Limited deployment in NA Wide acceptance in Europe MCU Support Standard UART or UART w/ CAN Peripheral FlexRay Peripheral extensions Applications Sensor / actuator interface to a master ECU (doors, mirrors, windows, motors, ) Sharing data between ECU s High speed data sharing, distributed control, safety critical systems 17

18 Drivers of Change User s access to more information in vehicle Bandwidth requirements increasing New functionality More interaction between modules Bandwidth-hungry signals such as video Requirements for safety and security on the bus More safety related functions and security being emphasized Control signals using messaging to a remote actuator Diagnostics improvements requires more information Driver assistance Vehicle to vehicle Vehicle to infrastructure Autosar software architecture, separation of functions from hardware implementation 18

19 Automotive Networks Tomorrow Multiplexing Distributed Control Multi-Media 150M Data Rate (bps) 100M 25M 10M 1M 500K CAN FD? CAN Multi-Master/CSMA-CR Distributed Data Ethernet & Ethernet AVB Multi-Master/CSMA-CD Leverage Consumer Technology & Standards High Data Rates Safety critical functions over FlexRay Ethernet? Multi-Master/Hybrid- TDMA Fault Tolerant MOST Timing Master/TDMA Designed for multimedia & infotainment 20K LIN Master-Slave Low cost I/O Interface 0.5 Source of cost for LIN, CAN, FlexRay, MOST: In-Vehicle Communication Networks: A Literature (Ugur Keskin). Ethernet cost: Engineering estimate Relative Communication Cost Per Node 19

20 CAN with Flexible Data Rate (CAN FD) Higher bit rate possible once arbitration completed After arbitration, only one node is transmitting CAN FD controllers backward compatible (CAN 2.0 A/B) 20

21 CAN with Flexible Data Rate (CAN FD) CAN FD Proposal Increase bit rate after arbitration completes Target: 2Mbps Increase the data payload OEM vision From 8 bytes to 64 bytes / frame CAN 2.0 A/B still used CAN FD where bandwidth increase needed Concerns Programming Requires revised / new ISO standard Impacts CAN Protocol Controller: new design required All nodes must have a CAN FD protocol controller Minimum of Passive mode Higher bit rates appear possible, but require HW/SW changes (protocol controller) Industry acceptance / standardization needed 21

22 Automotive Ethernet High data rates 10Mbps to 10+Gbps 100Mbps over unshielded single twisted pair cable Full duplex communication capability Options allow data rate (and cost) to match application requirements Leverage widely available consumer / office / industrial infrastructure to reduce cost of ownership Open standardization Existing & proven hardware IP Inexpensive & flexible cabling options Proven TPC/IP protocol stack Flexible configuration Supports different topologies Easily add nodes Virtually no limit on number of nodes Delivery not guaranteed But if it is fast enough. AVB Extension Interoperability with external networks Easily connects to Internet and Cloud Issue: Impact on cost-of-ownership by including stringent automotive requirements reliability in extreme conditions (temperature, voltage ), EMC/EME, 22

23 Ethernet AVB AVB (Audio Video Bridging) is developed for synchronized low latency A/V streaming transmission Time critical data (e.g. multimedia) and non-time-critical data carried over same Ethernet network Established common clock source among nodes Standards included in AVB 802.1AS Timing and Synchronization 802.1Qat Stream Reservation Protocol 802.1Qav Forwarding and Queuing for Time-Sensitive Streams 802.1BA Audio Video Bridging Systems 23

24 Future Network Electrical Architectures Backbone (FlexRay / Ethernet) Vehicle Gateway Diagnostic Connection Ethernet / FlexRay / CAN Ethernet / MOST CAN LIN LIN 24

25 Future Network Electrical Architectures Backbone (FlexRay / Ethernet) Ethernet / FlexRay / CAN Ethernet / MOST CAN LIN LIN 25

26 Security in Automotive 26

27 Security: one of many Automotive applications Safety-relevant messages Emergency Brake! must be secured! (so that they can be trusted) 27

28 Security-enabled Automotive MCU Master in the system: has unrestricted accesses to all MCU resources Main CPU Application Domain New master in the system: controls a (small) set of specific but exclusive resources for security relevant tasks Secure Domain Secure HW Security Services Secret Data Application Services Configuration / Parameter Files External Memory I/F Test / Debug I/F Communication I/F 28

29 Potential use Case: Encrypted CAN Messages Application Domain Main application loop Process the message received Prepare a message to send Execution time IRQ IRQ Secure Domain Wait for a CAN message Decrypt the mailbox Encrypt the mailbox Send the CAN message Secret keys are never seen in the application domain 29

30 Potential use Case: Boot Loader Verification Application Domain Initiate the application environment Initiate the communication stack Main application loop HW Reset Execution time Secure Domain Calculate H as the hash value of the boot loader memory Calculate H as the verification of the boot loader signature (prev. stored) No H == H? Yes Boot loader verification failed: break the application loop Boot loader verification successful: prepare for next security service Enables systematic background check with no impact on application domain timings 30

31 Security in Automotive applications: Renesas value proposition The next generation of Renesas Automotive devices integrates a scalable range of security peripherals to support existing and emerging security requirements on a broad range of automotive applications Security Peripherals for MCU with embedded Flash Security Peripherals for Flash-less SoC ICU-S ICU-M2 ICU-M3 Crypto Engine (low- to mid-end) (mid- to high-end) Low power Low cost Flexibility and performances High-performance (stream ciphers) 31

32 Energy Efficiency Trends 32

33 Energy Efficient Automotive Networks Not all ECUs need to be used during the entire drive-cycle Trade-off between: Energy savings ECU start-up time Selectively set ECU s into lower-power states Pretended Networking Partial Networking Energy Savings Window Controller Pretended Networking Trailer Module Seat Module Partial Networking Domain controller Start-Up Time 33

34 Pretended Networking Local Power Saving Intelligence Each ECU independently decides when to enter / exit a lower power mode MCU in sleep / stop mode - can be woken up quickly No changes to Network Management layer Compatible with other nodes not supporting this feature Easy integration into existing networks Uses existing / standard transceivers Efficiently implemented in software using Renesas low power products e.g. RH850/X1x Varying power saving effect, but seamless compatibility with existing networks 34

35 Partial Networking Shutting-down & starting-up during normal bus communication ECU s or groups of ECU s Shuts down complete ECU (except transceiver) MCU not powered Increases wake-up time Network master node(s) coordinate power saving intelligence Changes Network Management Layer Accommodate Partial Network Cluster (PNC) Requires special / new transceivers Selective Wake Up transceivers ISO ISO had global wakeup ISO has wakeup pattern or frame Potentially large power saving effect, but at expense of changes to the network 35

36 Summary 36

37 Summary Automotive communication Terminology & Concepts What is used today Trends for tomorrow Protocol changes Security Energy efficiency Renesas is ready Enabling the Smart Society 37

38 Questions? 38

39 Enabling The Smart Society Challenge: Automotive communication protocols are changing rapidly. The communication environment is growing quickly as users want access to more information available in-vehicle. Bandwidth requirements are dramatically increasing because of new functionality, more interaction between modules, and bandwidth-hungry signals such as video. Solution: This class will discuss the Automotive trends and how Renesas understands the requirements to meet future demands. Do you agree that we accomplished the above statement? 39

40 Renesas Electronics America Inc.

In-Vehicle Networking

In-Vehicle Networking In-Vehicle Networking SAE Network classification Class A networks Low Speed (

More information

Elettronica dei Sistemi Digitali Costantino Giaconia SERIAL I/O COMMON PROTOCOLS

Elettronica dei Sistemi Digitali Costantino Giaconia SERIAL I/O COMMON PROTOCOLS SERIAL I/O COMMON PROTOCOLS RS-232 Fundamentals What is RS-232 RS-232 is a popular communications interface for connecting modems and data acquisition devices (i.e. GPS receivers, electronic balances,

More information

LIN (Local Interconnect Network):

LIN (Local Interconnect Network): LIN (Local Interconnect Network): History: LIN (Local Interconnect Network) was developed as cost-effective alternate to CAN protocol. In 1998 a group of companies including Volvo, Motorola, Audi, BMW,

More information

Comparison of FlexRay and CAN-bus for Real-Time Communication

Comparison of FlexRay and CAN-bus for Real-Time Communication Comparison of FlexRay and CAN-bus for Real-Time Communication Andreas Forsberg Mälardalen University Högskoleplan 1 721 23 Västerås +46 768011236 afg05001@student.mdh.se Johan Hedberg Mälardalen University

More information

Local Interconnect Network Training. Local Interconnect Network Training. Overview

Local Interconnect Network Training. Local Interconnect Network Training. Overview Overview Local Interconnect Network Training History and introduction Technical features The ISO/OSI reference model and LIN Frames Message Frames Communication concept of LIN Command Frames and Extended

More information

In-Vehicular Communication Networking Protocol

In-Vehicular Communication Networking Protocol In-Vehicular Communication Networking Protocol ABSTRACT Renu Sharma Indiana University, Purdue University Indianapolis, IN rensharm@iupui.edu Today s modern vehicles contain a complex symbiosis of intelligent

More information

Welcome to the Introduction to Controller Area Network web seminar My name is William Stuart, and I am a Applications Engineer for the Automotive

Welcome to the Introduction to Controller Area Network web seminar My name is William Stuart, and I am a Applications Engineer for the Automotive Welcome to the Introduction to Controller Area Network web seminar My name is William Stuart, and I am a Applications Engineer for the Automotive Products Group within Microchip. This web seminar today

More information

www.imprezer.tk Introduction to www.union88.tk RACE FUELS Hans-Christian von der Wense Munich, Germany

www.imprezer.tk Introduction to www.union88.tk RACE FUELS Hans-Christian von der Wense Munich, Germany Introduction to Hans-Christian von der Wense Munich, Germany Overview Progress in Automotive Electronics and it s Impacts on Networking LIN Consortium LIN Concept Physical Layer Data Link Layer LIN Network

More information

Customer Experience. Silicon. Support & Professional Eng. Services. Freescale Provided SW & Solutions

Customer Experience. Silicon. Support & Professional Eng. Services. Freescale Provided SW & Solutions September 2013 Silicon Support & Professional Eng. Services Customer Experience Freescale Provided SW & Solutions Provide Valued Software, Support & Professional Engineering Services, Competitively 2 Customer

More information

Security in Automotive Applications

Security in Automotive Applications Security in Automotive Applications Renesas Electronics America Inc. Renesas Technology & Solution Portfolio 2 Microcontroller and Microprocessor Line-up 2010 2013 32-bit 8/16-bit 1200 DMIPS, Superscalar

More information

FlexRay A Communications Network for Automotive Control Systems

FlexRay A Communications Network for Automotive Control Systems FlexRay A Communications Network for Automotive Control Systems WFCS 2006 Rainer Makowitz Automotive Systems Engineering, EMEA Freescale and the Freescale logo are trademarks of Freescale Semiconductor,

More information

Controlled Random Access Methods

Controlled Random Access Methods Helsinki University of Technology S-72.333 Postgraduate Seminar on Radio Communications Controlled Random Access Methods Er Liu liuer@cc.hut.fi Communications Laboratory 09.03.2004 Content of Presentation

More information

Local Area Networks transmission system private speedy and secure kilometres shared transmission medium hardware & software

Local Area Networks transmission system private speedy and secure kilometres shared transmission medium hardware & software Local Area What s a LAN? A transmission system, usually private owned, very speedy and secure, covering a geographical area in the range of kilometres, comprising a shared transmission medium and a set

More information

Standardized software components will help in mastering the. software should be developed for FlexRay were presented at

Standardized software components will help in mastering the. software should be developed for FlexRay were presented at Embedded Software for FlexRay Systems Special aspects and benefits of implementing modularized software Standardized software components will help in mastering the growing complexity of the interplay of

More information

Designing 1000BASE-T1 Into Automotive Architectures

Designing 1000BASE-T1 Into Automotive Architectures Designing 1000BASE-T1 Into Automotive Architectures Alexander E Tan Ethernet PHY and Automotive PLM alextan@marvell.com Ethernet IP & Automotive Tech Day October 23 & 24th, 2014 Agenda What Does 1000BASE-T1

More information

Keeping Up with the Data & Security Demands of the Automotive IoT

Keeping Up with the Data & Security Demands of the Automotive IoT Keeping Up with the Data & Security Demands of the Automotive IoT AESIN 2015 Robert Moran Automotive Systems Engineering O C T O B E R 2 0 1 5 External Use Keeping Up with the Data & Security Demands of

More information

EECS 122: Introduction to Computer Networks Multiaccess Protocols. ISO OSI Reference Model for Layers

EECS 122: Introduction to Computer Networks Multiaccess Protocols. ISO OSI Reference Model for Layers EECS 122: Introduction to Computer Networks Multiaccess Protocols Computer Science Division Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1776

More information

Introduction to. LIN (Local Interconnect Network)

Introduction to. LIN (Local Interconnect Network) Introduction to LIN (Local Interconnect Network) Stéphane REY Revision 1.0 - ay 13 th, 2003 Table of content 1 INTRODUCTION...3 1.1 PURPOSE OF THE DOCUENT...3 1.2 ACRONYOUS...3 1.3 RELATED DOCUENTS...3

More information

Computer Network. Interconnected collection of autonomous computers that are able to exchange information

Computer Network. Interconnected collection of autonomous computers that are able to exchange information Introduction Computer Network. Interconnected collection of autonomous computers that are able to exchange information No master/slave relationship between the computers in the network Data Communications.

More information

Distributed Real-Time Systems (TI-DRTS) Track 2. CAN-BUS Introduction. Version 9.11.2009 Ref. VECTOR application note & Motorola note

Distributed Real-Time Systems (TI-DRTS) Track 2. CAN-BUS Introduction. Version 9.11.2009 Ref. VECTOR application note & Motorola note Distributed Real-Time Systems (TI-DRTS) Track 2 CAN-BUS Introduction Version 9.11.2009 Ref. VECTOR application note & Motorola note What is CAN? Controller Area Network (CAN) is a common, small area network

More information

SPI I2C LIN Ethernet. u Today: Wired embedded networks. u Next lecture: CAN bus u Then: 802.15.4 wireless embedded network

SPI I2C LIN Ethernet. u Today: Wired embedded networks. u Next lecture: CAN bus u Then: 802.15.4 wireless embedded network u Today: Wired embedded networks Ø Characteristics and requirements Ø Some embedded LANs SPI I2C LIN Ethernet u Next lecture: CAN bus u Then: 802.15.4 wireless embedded network Network from a High End

More information

High Speed Ethernet. Dr. Sanjay P. Ahuja, Ph.D. Professor School of Computing, UNF

High Speed Ethernet. Dr. Sanjay P. Ahuja, Ph.D. Professor School of Computing, UNF High Speed Ethernet Dr. Sanjay P. Ahuja, Ph.D. Professor School of Computing, UNF Hubs and Switches Hubs and Switches Shared Medium Hub The total capacity in the shared medium hub configuration (figure

More information

Chapter 9A. Network Definition. The Uses of a Network. Network Basics

Chapter 9A. Network Definition. The Uses of a Network. Network Basics Chapter 9A Network Basics 1 Network Definition Set of technologies that connects computers Allows communication and collaboration between users 2 The Uses of a Network Simultaneous access to data Data

More information

Industrial Networks & Databases

Industrial Networks & Databases Industrial Networks & Databases LONWORKS KNX 1 HVAC and BEMS HVAC - Heating, Ventilation & Air Conditioning BEMS - Building & Energy Management Systems 2 3 4 LONWORKS (Local Operating Networks) Open solution

More information

Unit of Learning # 2 The Physical Layer. Sergio Guíñez Molinos sguinez@utalca.cl 2-2009

Unit of Learning # 2 The Physical Layer. Sergio Guíñez Molinos sguinez@utalca.cl 2-2009 Unit of Learning # 2 The Physical Layer Sergio Guíñez Molinos sguinez@utalca.cl 2-2009 Local Area Network (LAN) Redes de Computadores 2 Historic topologies more used in LAN Ethernet Logical Bus and Physical

More information

Embedded Systems. 8. Communication

Embedded Systems. 8. Communication Embedded Systems 8. Communication Lothar Thiele 8-1 Contents of Course 1. Embedded Systems Introduction 2. Software Introduction 7. System Components 10. Models 3. Real-Time Models 4. Periodic/Aperiodic

More information

Based on Computer Networking, 4 th Edition by Kurose and Ross

Based on Computer Networking, 4 th Edition by Kurose and Ross Computer Networks Ethernet Hubs and Switches Based on Computer Networking, 4 th Edition by Kurose and Ross Ethernet dominant wired LAN technology: cheap $20 for NIC first widely used LAN technology Simpler,

More information

Simple and error-free startup of the communication cluster. as well as high system stability over long service life are

Simple and error-free startup of the communication cluster. as well as high system stability over long service life are Network Management for FlexRay New network topologies tested in practice Simple and error-free startup of the communication cluster as well as high system stability over long service life are required

More information

Smart Solutions for Network IP Migration

Smart Solutions for Network IP Migration for Network IP Migration Network Access Timing and Synchronization Test & Measurement Agenda: Architectures and Topologies Product life cycle Media and Protocol Conversion Application Cases Conclusion

More information

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction Wireless Physical Layer Q1. Is it possible to transmit a digital signal, e.g., coded as square wave as used inside a computer, using radio transmission without any loss? Why? It is not possible to transmit

More information

Introduction to LIN. Webinar

Introduction to LIN. Webinar Introduction to LIN Webinar V2.2.07 2014-03-03 Agenda > Information 4 Overview 6 LIN Workflow 9 LIN Physical Layer 12 LIN Communication 14 Synchronization of the LIN nodes 16 LIN Message & Scheduling 19

More information

Local Area Networks. Guest Instructor Elaine Wong. Elaine_06_I-1

Local Area Networks. Guest Instructor Elaine Wong. Elaine_06_I-1 Local Area Networks Guest Instructor Elaine Wong Elaine_06_I-1 Outline Introduction to Local Area Networks (LANs) Network architecture Geographical area LAN applications LAN Technologies Ethernet Fiber

More information

1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network

1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network Review questions 1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network B Local area network C Client/server

More information

Local Area Networks (LANs) Blueprint (May 2012 Release)

Local Area Networks (LANs) Blueprint (May 2012 Release) Local Area Networks (LANs) The CCNT Local Area Networks (LANs) Course April 2012 release blueprint lists the following information. Courseware Availability Date identifies the availability date for the

More information

VELOCITY LAB TM Embedded Development Ecosystem

VELOCITY LAB TM Embedded Development Ecosystem VELOCITY LAB TM Embedded Development Ecosystem 0C05B Renesas Electronics America Inc. Renesas Technology & Solution Portfolio 2 Microcontroller and Microprocessor Line-up 2010 2013 32-bit 8/16-bit 1200

More information

Ethernet. Ethernet Frame Structure. Ethernet Frame Structure (more) Ethernet: uses CSMA/CD

Ethernet. Ethernet Frame Structure. Ethernet Frame Structure (more) Ethernet: uses CSMA/CD Ethernet dominant LAN technology: cheap -- $20 for 100Mbs! first widely used LAN technology Simpler, cheaper than token rings and ATM Kept up with speed race: 10, 100, 1000 Mbps Metcalfe s Etheret sketch

More information

CS263: Wireless Communications and Sensor Networks

CS263: Wireless Communications and Sensor Networks CS263: Wireless Communications and Sensor Networks Matt Welsh Lecture 4: Medium Access Control October 5, 2004 2004 Matt Welsh Harvard University 1 Today's Lecture Medium Access Control Schemes: FDMA TDMA

More information

Vorlesung Kommunikationsnetze Fieldbus Systems

Vorlesung Kommunikationsnetze Fieldbus Systems Vorlesung Kommunikationsnetze Fieldbus Systems Prof. Dr. H. P. Großmann mit B. Wiegel sowie A. Schmeiser und M. Rabel Sommersemester 2009 Institut für Organisation und Management von Informationssystemen

More information

Power saving in CAN applications

Power saving in CAN applications Power saving in CAN applications Magnus-Maria Hell, Infineon Technologies Ursula Kelling, Infineon Technologies During recent years, the discussion about power saving had and has different aspects. One

More information

Network Topologies. Network Topologies

Network Topologies. Network Topologies Network Topologies LANs and WANs - Geographical coverage LANs A single geographical location, such as office building, school, etc Typically High speed and cheaper. WANs Spans more than one geographical

More information

Module 15: Network Structures

Module 15: Network Structures Module 15: Network Structures Background Topology Network Types Communication Communication Protocol Robustness Design Strategies 15.1 A Distributed System 15.2 Motivation Resource sharing sharing and

More information

Fast Ethernet and Gigabit Ethernet. Computer Networks: Fast and Gigabit Ethernet

Fast Ethernet and Gigabit Ethernet. Computer Networks: Fast and Gigabit Ethernet Fast Ethernet and Gigabit Ethernet 1 Fast Ethernet (100BASE-T) How to achieve 100 Mbps capacity? MII LLC MAC Convergence Sublayer Media Independent Interface Media Dependent Sublayer Data Link Layer Physical

More information

Fast Ethernet and Gigabit Ethernet. Networks: Fast Ethernet 1

Fast Ethernet and Gigabit Ethernet. Networks: Fast Ethernet 1 Fast Ethernet and Gigabit Ethernet Networks: Fast Ethernet 1 Fast Ethernet (100BASE-T) How to achieve 100 Mbps capacity? MII LLC MAC Convergence Sublayer Media Independent Interface Media Dependent Sublayer

More information

Communication Networks. MAP-TELE 2011/12 José Ruela

Communication Networks. MAP-TELE 2011/12 José Ruela Communication Networks MAP-TELE 2011/12 José Ruela Network basic mechanisms Introduction to Communications Networks Communications networks Communications networks are used to transport information (data)

More information

Chapter 4. Medium Access Control. IN2P3 Octobre 2002 Jean-Pierre Thomesse

Chapter 4. Medium Access Control. IN2P3 Octobre 2002 Jean-Pierre Thomesse Chapter 4 Medium Access Control 1 Introduction Objectives To manage the access to the medium or channel To take into account the time constraints To schedule the traffics Different solutions History Different

More information

CSE331: Introduction to Networks and Security. Lecture 6 Fall 2006

CSE331: Introduction to Networks and Security. Lecture 6 Fall 2006 CSE331: Introduction to Networks and Security Lecture 6 Fall 2006 Open Systems Interconnection (OSI) End Host Application Reference model not actual implementation. Transmits messages (e.g. FTP or HTTP)

More information

CSCI 362 Computer and Network Security

CSCI 362 Computer and Network Security The Purpose of ing CSCI 362 Computer and Security Introduction to ing Goals: Remote exchange and remote process control. A few desirable properties: Interoperability, Flexibility, Geographical range, Scalability,

More information

Point-to-Point Vs. Shared Channel Communication In LANs Point-to-point:

Point-to-Point Vs. Shared Channel Communication In LANs Point-to-point: Point-to-Point Vs. Shared Channel Communication In LANs Point-to-point: Computers connected by communication channels that each connect exactly two computers with access to full channel bandwidth. Forms

More information

Ethernet Passive Optical Networks EPON

Ethernet Passive Optical Networks EPON Ethernet Passive Optical Networks EPON IEEE 802.3 Ethernet in the First Mile Study Group January 8-9, 2001, Irvine, CA Gerry Pesavento Alloptic, Inc. Tel 925-245-7647 Email gerry.pesavento@alloptic.com

More information

Performance Testing BroadR-Reach Automotive Ethernet

Performance Testing BroadR-Reach Automotive Ethernet White Paper Performance Testing BroadR-Reach Automotive Ethernet Key Elements for an Automotive-Specific Ethernet Test Regime www.spirent.com Performance Testing BroadR-Reach Automotive Ethernet SPIRENT

More information

Network from a High End Car. Embedded Networking. Embedded vs. TCP/IP. Which is better?

Network from a High End Car. Embedded Networking. Embedded vs. TCP/IP. Which is better? Network from a High End Car Today: Wired embedded networks Characteristics and requirements Some embedded LANs SPI I2C LIN Ethernet Next lecture: CAN bus Then: 802.15.4 wireless embedded network Embedded

More information

Tutorial Introduction

Tutorial Introduction Tutorial Introduction PURPOSE: This tutorial describes concepts related to communication busses, including attributes, functions, and the different types of bus systems. The intent is to provide a baseline

More information

Ethernet A Survey on its Fields of Application

Ethernet A Survey on its Fields of Application Ethernet A Survey on its Fields of Application Fachtagung ITG FA 5.2 "Zukunft der Netze" Jörg Sommer et al. joerg.sommer@ikr.uni-stuttgart.de 7. Oktober 2010 Universität Stuttgart Institut für Kommunikationsnetze

More information

Wired Local Area Network (Ethernet)

Wired Local Area Network (Ethernet) Chapter 13 Wired Local Area Network (Ethernet) IEEE Standards In 1985, the Computer Society of the IEEE started a project, called Project 802, to set standards to enable intercommunication among equipment

More information

FOUNDATION Fieldbus High Speed Ethernet Control System

FOUNDATION Fieldbus High Speed Ethernet Control System FOUNDATION Fieldbus High Speed Ethernet Control System Sean J. Vincent Fieldbus Inc. Austin, TX, USA KEYWORDS Fieldbus, High Speed Ethernet, H1, ABSTRACT FOUNDATION fieldbus is described in part by the

More information

Random Access Protocols

Random Access Protocols Lecture Today slotted vs unslotted ALOHA Carrier sensing multiple access Ethernet DataLink Layer 1 Random Access Protocols When node has packet to send transmit at full channel data rate R. no a priori

More information

Microcomputer Protocol Implementation at Local Interconnect Network Georgi Krastev

Microcomputer Protocol Implementation at Local Interconnect Network Georgi Krastev Microcomputer Protocol Implementation at Local Interconnect Network Georgi Krastev Abstract: The paper discusses the issues of microcomputer protocol implementation at local interconnect network for automobile

More information

LOCAL INTERCONNECT NETWORK (LIN)

LOCAL INTERCONNECT NETWORK (LIN) 54B-1 GROUP 54B LOCAL INTERCONNECT NETWORK (LIN) CONTENTS GENERAL INFORMATION........ 54B-2............ 54B-3 STRUCTURE................... 54B-2 54B-2 LIN refers to "Local Interconnect Network," which

More information

IT4405 Computer Networks (Compulsory)

IT4405 Computer Networks (Compulsory) IT4405 Computer Networks (Compulsory) INTRODUCTION This course provides a comprehensive insight into the fundamental concepts in data communications, computer network systems and protocols both fixed and

More information

Course 12 Synchronous transmission multiplexing systems used in digital telephone networks

Course 12 Synchronous transmission multiplexing systems used in digital telephone networks Course 12 Synchronous transmission multiplexing systems used in digital telephone networks o Disadvantages of the PDH transmission multiplexing system PDH: no unitary international standardization of the

More information

PROFINET the Industrial Ethernet standard. Siemens AG 2013. Alle Rechte vorbehalten.

PROFINET the Industrial Ethernet standard. Siemens AG 2013. Alle Rechte vorbehalten. the Industrial Ethernet standard is 100% Ethernet is Ethernet Ethernet is the established standard in the IT world for fast exchange of data (IEEE 802.3) is always full duplex simultaneous communication

More information

Gigabit Ethernet: Architectural Design and Issues

Gigabit Ethernet: Architectural Design and Issues Gigabit Ethernet: Architectural Design and Issues Professor of Computer and Information Sciences Columbus, OH 43210 http://www.cis.ohio-state.edu/~jain/ 9-1 Overview Distance-Bandwidth Principle 10 Mbps

More information

Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8

Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8 Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8 Multiple Access Scheme Allow many users to share simultaneously a finite amount of radio spectrum Need to be done without severe degradation of the

More information

EPL 657 Wireless Networks

EPL 657 Wireless Networks EPL 657 Wireless Networks Some fundamentals: Multiplexing / Multiple Access / Duplex Infrastructure vs Infrastructureless Panayiotis Kolios Recall: The big picture... Modulations: some basics 2 Multiplexing

More information

Operating System Concepts. Operating System 資 訊 工 程 學 系 袁 賢 銘 老 師

Operating System Concepts. Operating System 資 訊 工 程 學 系 袁 賢 銘 老 師 Lecture 7: Distributed Operating Systems A Distributed System 7.2 Resource sharing Motivation sharing and printing files at remote sites processing information in a distributed database using remote specialized

More information

ECE 333: Introduction to Communication Networks Fall 2001

ECE 333: Introduction to Communication Networks Fall 2001 ECE 333: Introduction to Communication Networks Fall 2001 Lecture 17: Medium Access Control V Perfectly scheduled approaches Token ring networks 1 We have categorized channel allocation techniques as either

More information

Local-Area Network -LAN

Local-Area Network -LAN Computer Networks A group of two or more computer systems linked together. There are many [types] of computer networks: Peer To Peer (workgroups) The computers are connected by a network, however, there

More information

Internet of things (IOT) applications covering industrial domain. Dev Bhattacharya dev_bhattacharya@ieee.org

Internet of things (IOT) applications covering industrial domain. Dev Bhattacharya dev_bhattacharya@ieee.org Internet of things (IOT) applications covering industrial domain Dev Bhattacharya dev_bhattacharya@ieee.org Outline Internet of things What is Internet of things (IOT) Simplified IOT System Architecture

More information

2. What is the maximum value of each octet in an IP address? A. 128 B. 255 C. 256 D. None of the above

2. What is the maximum value of each octet in an IP address? A. 128 B. 255 C. 256 D. None of the above 1. How many bits are in an IP address? A. 16 B. 32 C. 64 2. What is the maximum value of each octet in an IP address? A. 128 B. 255 C. 256 3. The network number plays what part in an IP address? A. It

More information

Real-Time Systems Hermann Härtig Real-Time Communication (following Kopetz, Liu, Schönberg, Löser)

Real-Time Systems Hermann Härtig Real-Time Communication (following Kopetz, Liu, Schönberg, Löser) Real-Time Systems Hermann Härtig Real-Time Communication (following Kopetz, Liu, Schönberg, Löser) 05/02/15 Contents Overview IO Busses: PCI Networks as schedulable resources: Priority / Time-Driven /

More information

Real-Time (Paradigms) (51)

Real-Time (Paradigms) (51) Real-Time (Paradigms) (51) 5. Real-Time Communication Data flow (communication) in embedded systems : Sensor --> Controller Controller --> Actor Controller --> Display Controller Controller Major

More information

Performance Evaluation of Wired and Wireless Local Area Networks

Performance Evaluation of Wired and Wireless Local Area Networks International Journal of Engineering Research and Development ISSN: 2278-067X, Volume 1, Issue 11 (July 2012), PP.43-48 www.ijerd.com Performance Evaluation of Wired and Wireless Local Area Networks Prof.

More information

OSI Layers in Automotive Networks

OSI Layers in Automotive Networks OSI Layers in Automotive Networks 2013-03-20 IEEE 802.1 Plenary Meeting - Orlando Aboubacar Diarra, Robert Bosch GmbH 1 Outline OSI Reference Model Simplified generic Architecture for Automotive Serial

More information

Computer Networks. Definition of LAN. Connection of Network. Key Points of LAN. Lecture 06 Connecting Networks

Computer Networks. Definition of LAN. Connection of Network. Key Points of LAN. Lecture 06 Connecting Networks Computer Networks Lecture 06 Connecting Networks Kuang-hua Chen Department of Library and Information Science National Taiwan University Local Area Networks (LAN) 5 kilometer IEEE 802.3 Ethernet IEEE 802.4

More information

Network Design. Yiannos Mylonas

Network Design. Yiannos Mylonas Network Design Yiannos Mylonas Physical Topologies There are two parts to the topology definition: the physical topology, which is the actual layout of the wire (media), and the logical topology, which

More information

Bluetooth in Automotive Applications Lars-Berno Fredriksson, KVASER AB

Bluetooth in Automotive Applications Lars-Berno Fredriksson, KVASER AB Bluetooth in Automotive Applications Lars-Berno Fredriksson, KVASER AB ABSTRACT There is a potential for 50-400 million per year Bluetooth nodes within the car market if Bluetooth can be integrated into

More information

Chapter 16: Distributed Operating Systems

Chapter 16: Distributed Operating Systems Module 16: Distributed ib System Structure, Silberschatz, Galvin and Gagne 2009 Chapter 16: Distributed Operating Systems Motivation Types of Network-Based Operating Systems Network Structure Network Topology

More information

Chapter 14: Distributed Operating Systems

Chapter 14: Distributed Operating Systems Chapter 14: Distributed Operating Systems Chapter 14: Distributed Operating Systems Motivation Types of Distributed Operating Systems Network Structure Network Topology Communication Structure Communication

More information

Token Ring and. Fiber Distributed Data Interface (FDDI) Networks: Token Ring and FDDI 1

Token Ring and. Fiber Distributed Data Interface (FDDI) Networks: Token Ring and FDDI 1 Token Ring and Fiber Distributed Data Interface (FDDI) Networks: Token Ring and FDDI 1 IEEE 802.5 Token Ring Proposed in 1969 and initially referred to as a Newhall ring. Token ring :: a number of stations

More information

Ethernet, VLAN, Ethernet Carrier Grade

Ethernet, VLAN, Ethernet Carrier Grade Ethernet, VLAN, Ethernet Carrier Grade Dr. Rami Langar LIP6/PHARE UPMC - University of Paris 6 Rami.langar@lip6.fr www-phare.lip6.fr/~langar RTEL 1 Point-to-Point vs. Broadcast Media Point-to-point PPP

More information

Gigabit Ethernet. Abstract. 1. Introduction. 2. Benefits of Gigabit Ethernet

Gigabit Ethernet. Abstract. 1. Introduction. 2. Benefits of Gigabit Ethernet Table of Contents Abstract... 2 1. Introduction... 2 2. Benefits of Gigabit Ethernet... 2 2.1 Easy Migration to Higher Performance Levels... 3 2.2 Decreased Overall Costs Over Time... 3 2.3 Supports for

More information

TCOM 370 NOTES 99-12 LOCAL AREA NETWORKS AND THE ALOHA PROTOCOL

TCOM 370 NOTES 99-12 LOCAL AREA NETWORKS AND THE ALOHA PROTOCOL 1. Local Area Networks TCOM 370 NOTES 99-12 LOCAL AREA NETWORKS AND THE ALOHA PROTOCOL These are networks spanning relatively short distances (e.g. within one building) for local point-to-point and point-to-multipoint

More information

Written examination in Computer Networks

Written examination in Computer Networks Written examination in Computer Networks February 14th 2014 Last name: First name: Student number: Provide on all sheets (including the cover sheet) your last name, rst name and student number. Use the

More information

Vehicle data acquisition using CAN By Henning Olsson, OptimumG henning.olsson@optimumg.com

Vehicle data acquisition using CAN By Henning Olsson, OptimumG henning.olsson@optimumg.com Vehicle data acquisition using By Henning Olsson, OptimumG henning.olsson@optimumg.com Introduction: Data acquisition is one of the best tools to increase the understanding of vehicle behavior. One can

More information

Tutorial. www.ccontrols.com

Tutorial. www.ccontrols.com Tutorial 1 Tutorial CONTROLLER AREA NETWORK CAN was designed by Bosch and is currently described by ISO 11898 1. In terms of the Open Systems Interconnection model (OSI), CAN partially defines the services

More information

Data Exchange On The CAN Bus I

Data Exchange On The CAN Bus I Service. Self-Study Programme 238 Data Exchange On The CAN Bus I Basics The CAN bus system in a car interlinks the control units to form a network. This produces new functions in the car and in diagnostics

More information

Chapter 5. Data Communication And Internet Technology

Chapter 5. Data Communication And Internet Technology Chapter 5 Data Communication And Internet Technology Purpose Understand the fundamental networking concepts Agenda Network Concepts Communication Protocol TCP/IP-OSI Architecture Network Types LAN WAN

More information

Development of Scalable CAN Protocol

Development of Scalable CAN Protocol AUTOMOTIVE Development of Scalable CAN Protocol Ryo KURACHI*, Masanobu NISHIMURA*, Hiroaki TAKADA, Shigeharu TESHIMA, Yukihiro MIYASHITA, Satoshi HORIHATA, Hideki YAMAMOTO and Akihiro NATSUME In today

More information

Introduction to Ethernet

Introduction to Ethernet Technical Tutorial 2002 12-06 Table of Contents 1: Introduction 2: Ethernet 3: IEEE standards 4: Topology 5: CSMA/CD 6: Wireless-LAN 7: Transmission Speed 8: Limitations of Ethernet 9: Sena Products and

More information

Master thesis. On-Board Diagnostics over Ethernet. School of Information Science, Computer and Electrical Engineering

Master thesis. On-Board Diagnostics over Ethernet. School of Information Science, Computer and Electrical Engineering Master thesis School of Information Science, Computer and Electrical Engineering Master report, IDE 1263, June 2012 Embedded and Intelligent Systems On-Board Diagnostics over Ethernet Saeed Moradpour Chahaki

More information

Chapter 9. Communications and Networks. McGraw-Hill/Irwin. Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved.

Chapter 9. Communications and Networks. McGraw-Hill/Irwin. Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 9 Communications and Networks McGraw-Hill/Irwin Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Competencies (Page 1 of 2) Discuss connectivity, the wireless revolution,

More information

An Interpretation of MIL-STD-1553B

An Interpretation of MIL-STD-1553B Overview 1 An Interpretation of MIL-STD-1553B Overview 0. Introduction This document provides an explanation of each part of MIL-STD-1553 on clause-byclause basis. Each clause of the Standard is presented

More information

Joint ITU-T/IEEE Workshop on Next Generation Optical Access Systems. DBA & QoS on the PON - Commonalities with Switching & Routing

Joint ITU-T/IEEE Workshop on Next Generation Optical Access Systems. DBA & QoS on the PON - Commonalities with Switching & Routing Joint ITU-T/IEEE Workshop on Next Generation Optical Access Systems DBA & QoS on the PON - Commonalities with Switching & Routing Howard Frazier, Technical Director Broadcom Corporation Agenda Passive

More information

Universal Flash Storage: Mobilize Your Data

Universal Flash Storage: Mobilize Your Data White Paper Universal Flash Storage: Mobilize Your Data Executive Summary The explosive growth in portable devices over the past decade continues to challenge manufacturers wishing to add memory to their

More information

LoRaWAN. What is it? A technical overview of LoRa and LoRaWAN. Technical Marketing Workgroup 1.0

LoRaWAN. What is it? A technical overview of LoRa and LoRaWAN. Technical Marketing Workgroup 1.0 LoRaWAN What is it? A technical overview of LoRa and LoRaWAN Technical Marketing Workgroup 1.0 November 2015 TABLE OF CONTENTS 1. INTRODUCTION... 3 What is LoRa?... 3 Long Range (LoRa )... 3 2. Where does

More information

Process Control and Automation using Modbus Protocol

Process Control and Automation using Modbus Protocol Process Control and Automation using Modbus Protocol Modbus is the fundamental network protocol used in most industrial applications today. It is universal, open and an easy to use protocol. Modbus has

More information

Local Area Networks. Ethernet 802.3 LAN - 7-1.

Local Area Networks. Ethernet 802.3 LAN - 7-1. Local Area Networks Ethernet 802.3 LAN - 7-1 Local Area Networks (Lokale Netze) Wide Area Network LAN - 7-2 Local Area Networks What is a LAN? Multiple systems attached to an often shared medium high total

More information

Bus Data Acquisition and Remote Monitoring System Using Gsm & Can

Bus Data Acquisition and Remote Monitoring System Using Gsm & Can IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, Volume 8, Issue 3 (Nov. - Dec. 2013), PP 88-92 Bus Data Acquisition and Remote Monitoring System

More information

Overview. Next Lecture. Last Lecture. This Lecture. Flow control and error control. Local area networking 1 Source: Sections 13

Overview. Next Lecture. Last Lecture. This Lecture. Flow control and error control. Local area networking 1 Source: Sections 13 Overview Last Lecture Flow control and error control This Lecture Local area networking 1 Source: Sections 13 Next Lecture Local area networking 2 Source: Sections 17.1-17.2 1 Data Link Layer Standards

More information